Investigation of crystalline lens overshooting: experiment and optomechanical simulation results.

Crystalline lens overshooting refers to a situation in which the lens momentarily shifts too much from its typical location immediately after stopping the rotational movement of the eye globe. This movement can be observed using an optical technique called Purkinje imaging. In this work, an experimental setup was designed to reproduce this effect using a fresh porcine eye.

Periprosthetic fractures after shoulder arthroplasty: a systematic review.

Purpose: The goal of this study was to review available literature on periprosthetic shoulder fractures to evaluate epidemiology, risk factors and support clinical decision-making regarding diagnostics, preoperative planning, and treatment options.

Methods: Two authors cross-checked the PubMed and Web of Science medical databases. The inclusion criteria were as follows: original human studies published in English, with the timeframe not limited, and the following keywords were used: 'periprosthetic shoulder fracture,' 'total shoulder arthroplasty periprosthetic fractures,' 'total shoulder arthroplasty fracture,' and 'total shoulder replacement periprosthetic fracture.

Complexity of crystalline lens wobbling investigated by means of combined mechanical and optical simulations.

Crystalline lens wobbling is a phenomenon when the lens oscillates briefly from its normal position immediately after stopping the rotational movement of the eye globe. It can be observed by means of Purkinje imaging. The aim of this research is to present the data and computation workflow that involve both biomechanical and optical simulations that can mimic this effect, aimed to better understanding of lens wobbling.

Ligament Ruptures in Ankle Fractures-Was Lauge-Hansen Right?

The contribution of Lauge-Hansen to the understanding and treatment of ankle fractures cannot be underestimated, an unquestionable merit being the analysis of the ligamentous component of these injuries that are considered as equivalent to the respective malleolar fractures. In numerous clinical and biomechanical studies, the lateral ankle ligaments are ruptured either together with or instead of the syndesmotic ligaments, as predicted by the Lauge-Hansen stages. A ligament-based view on malleolar fractures may deepen the understanding of the mechanism of injury and lead to a stability-based evaluation and treatment of the 4 osteoligamentous pillars (malleoli) at the ankle.

Novel Method of Measuring Corneal Viscoelasticity Using the Corvis ST Tonometer.

Background: The process of rapid propagation of the corneal deformation in air puff tonometer depends not only on intraocular pressure, but also on the biomechanical properties of the cornea and anterior eye. One of the biomechanical properties of the cornea is viscoelasticity, which is the most visible in its high-speed deformations. It seems reasonable to link the corneal viscoelasticity parameter to two moments of the highest speed of corneal deformations, when the cornea buckles.

Chronic Syndesmotic Injuries: Arthrodesis versus Reconstruction.

"Chronic syndesmotic injury covers a broad range of symptoms and pathologies. Anterolateral ankle impingement without instability is treated by arthroscopic debridement. Subacute, unstable, syndesmotic injuries are treated by arthroscopic or open debridement followed by secondary stabilization using suture button device or permanent screw placement.

Non-weightbearing compared with weightbearing x-rays in hallux valgus decision-making.

Objective: To report the effect of weightbearing x-ray imaging on clinical decisions in hallux valgus. Weightbearing (WB) x-ray is standard imaging for symptomatic hallux valgus (HV). In our clinical practice, often patients are presenting with non-weightbearing (NWB) x-rays.

Arthroscopic Latarjet Stabilization: Analysis of the Learning Curve in the First 90 Primary Cases: Early Clinical Results and Computed Tomography Evaluation.

Purpose: To assess the learning curve of arthroscopic Latarjet, evaluating time of surgery, clinical outcomes, complications, revisions, and recurrence.

Methods: Arthroscopic Latarjet procedures performed from 2011 to 2016 were reviewed. Satisfaction rate, subjective shoulder value, Walch-Duplay, Rowe scores, range of motion, and stability were evaluated on clinical examination.

Non-contact tonometry using Corvis ST: analysis of corneal vibrations and their relation with intraocular pressure.

The aim of this study was to determine characteristic frequencies of corneal vibrations occurring during air-puff intraocular pressure (IOP) measurement using the Corvis ST tonometer. Relations of frequency of the corneal vibrations with IOP were examined. Two selected vibration frequencies-frequency with maximum amplitude, and mass center of the frequency distribution area, for which the amplitude was higher than 50% (CM50)-present significant correlations with non-corrected IOP and biomechanical corrected IOP (bIOP).

Intraoperative graft-related complications are a risk factor for recurrence in arthroscopic Latarjet stabilisation.

Purpose: The goal of this study was to evaluate clinical and radiological outcomes after arthroscopic Latarjet stabilisation in anterior shoulder instability.

Methods: Ninety-three patients after primary arthroscopic Latarjet stabilisation were reviewed. Satisfaction, subjective shoulder value (SSV), Walch-Duplay and Rowe scores, and range of motion and stability were evaluated on clinical examination.

X-ray features to predict ankle fracture mechanism.

Introduction: The genetic Lauge-Hansen classification has been traditionally used for reconstruction of the mechanism of ankle injury. The ability of the Lauge-Hansen classification to predict actual mechanism of the injury has been questioned in recent studies, leaving a void in medicolegal reasoning. The aim of this study is to identify morphologic features of malleolar fractures on plain X-rays that may be used to reveal the fracture mechanism.

Operative Setup to Improve Sagittal Syndesmotic Reduction: Technical Tip.

We analyzed the operative measures that may be used to reduce the likelihood of sagittal syndesmotic malreduction. Hence, we propose a simple technical tip to avoid sagittal plane malreduction of the fibula within the syndesmosis in ankle fractures. Supporting the leg under the heel should be avoided when performing syndesmotic reduction for unstable malleolar fractures, and support under the calf should be used instead.

EFAS Score - Multilingual development and validation of a patient-reported outcome measure (PROM) by the score committee of the European Foot and Ankle Society (EFAS).

Background: A scientifically sound validated foot and ankle specific score validated ab initio for different languages is missing. The aim of a project of the European Foot and Ankle Society (EFAS) was to develop, validate, and publish a new score(the EFAS-Score) for different European languages.

Methods: The EFAS Score was developed and validated in three stages: (1) item (question) identification, (2) item reduction and scale exploration, (3) confirmatory analyses and responsiveness.

Anatomy of the tibial incisura as a risk factor for syndesmotic injury.

Background: The study aims at comparing the bony anatomy of the syndesmosis in patients who sustained a high fibular fracture with syndesmosis disruption and that of the non-injured population. We hypothesised that there are certain anatomical features making the syndesmosis susceptible to injury.

Methods: The CT examinations of 75 patients who sustained a high fibular fracture with syndesmosis disruption and control group of 75 patients with unrelated foot problems were compared.

Flexor Hallucis Longus Transfer for Foot Drop without Functioning Tibialis Posterior.

For a foot drop resulting from peroneal nerve palsy transferring the tibialis posterior tendon is a standard surgical treatment. The situation of foot drop with no functioning tibialis posterior presents a challenge. We describe a case of successful flexor hallucis longus transfer in such a case.

Correlation of Incisura Anatomy With Syndesmotic Malreduction.

Background: The anatomy of the syndesmosis is variable, yet little is known on the correlation between differences in anatomy and syndesmosis reduction results. The aim of this study was to analyze the correlation between syndesmotic anatomy and the modes of syndesmotic malreduction.

Methods: Bilateral postreduction ankle computed tomography (CT) scans of 72 patients treated for fractures with syndesmotic disruption were analyzed.

Ankle fracture - Correlation of Lauge-Hansen classification and patient reported fracture mechanism.

Introduction: The genetic Lauge-Hansen classification is used for reconstruction of the mechanism of ankle injury. In this study, we addressed the question of agreement between the mechanism of the fracture as postulated by the Lauge-Hansen classification and mechanism reported by the patient in rotational ankle fractures.

Material And Methods: Radiographs of 78 patients with acute malleolar fractures were analyzed and compared with fracture mechanisms reported by these patients.

Eye retraction and rotation during Corvis ST 'air puff' intraocular pressure measurement and its quantitative analysis.

Purpose: The aim of this study was to analyse the indentation and deformation of the corneal surface, as well as eye retraction, which occur during air puff intraocular pressure (IOP) measurement.

Methods: A group of 10 subjects was examined using a non-contact Corvis ST tonometer, which records image sequences of corneas deformed by an air puff. Obtained images were processed numerically in order to extract information about corneal deformation, indentation and eyeball retraction.

Aseptic Destruction of the Elbow Joint after Radial Head Replacement. Case Study.

Radial head replacement should be a routine treatment in cases of non-reconstructable radial head fractures. With the growing number of radial head arthroplasties, we are going to see more complications related to this procedure. We describe a case of aseptic destruction of the elbow joint, probably related to the release of polyethylene particles from the prosthetic head.

Numerical analysis of corneal curvature dynamics based on Corvis tonometer images.

The paper presents numerical analysis of corneal curvature distribution, based on Corvis ST images. It was shown that a new approach to analysis of corneal curvature from tonometer images enables a better description and understanding of processes during fast corneal deformation. Ten healthy volunteers participated in nine repeated measurements on one eye.

Talus Bipartitus Etiology - Is Neonatal Infection Involved?

Unlabelled: Talus bipartitus is a rare skeletal variation. Several causative factors have been proposed, but none of them seem to be convincing. We hypothesize that talus bipartitus may result from ossification disruption in neonatal period caused possibly by an infection.

Translation, Cultural Adaptation and Validation of Polish Version of Foot and Ankle Outcomes Questionnaire.

Background: The Polish orthopaedic literature lacks a tool to measure patient reported treatment outcomes in the foot and ankle.

Material And Methods: The translation and cultural adaptation of the Foot and Ankle Outcomes Questionnaire was performed in accordance with relevant guidelines. The Polish version of the questionnaire was tested to check its test retest reliability, internal consistency and construct validity.

Hallux checkrein deformity resulting from the scarring of long flexor muscle belly - case report.

A case of posttraumatic checkrein deformity of the hallux is presented. This deformity is most often caused by scarring of the muscle belly or tethering of the tendon. A 22-year old woman developed a hallux checkrein deformity after a bimaleolar fracture.